php - calculate values on basis of text box entry -

i have 1 row of text boxes generated php loop , mysql id.

     <input class="text_field1" id="<?php echo $i ?>" name="q_<?php echo $row['pid']; ?>"  type="text" style="width:150px" />             <input  disabled="disabled" class="text_fieldd" id="p_<?php echo $row['pid'];  ?>" name="p_<?php echo $row['pid']; ?>" type="text" value="<?php echo $row['pprice'] ?>" />      <input  disabled="disabled" class="text_fieldd" id="t_<?php echo $row['pid']; ?>"  name="t_<?php echo $row['pid']; ?>" type="text" /> 

what want is

when enter value in text box class text_field1, want calculate total in text box name t_.... (qty * price ,p_....)

i try code works little bit not want , jquery code is

 $('.text_field1').bind("focus blur change keyup", function(){          var $el = $(this);         var numpallets =isnumeric1($el.val());           }); 

thanks

i think should work. binded keyup in example:

$('.text_field1').keyup(function() {     var pid = $(this).attr("name").split("_")[1]; // row pid     var q = $(this).val() * 1;     var p = $("#p_"+pid).val() * 1;     $("#t_"+pid).val(q * p); });